IBM Ricoh ScanPro user manual Pixel, Bit color, Brightness, Contrast, Gamma

Pixel

Represents a single dot of the picture. Pixels are used by the computer to represent image information in digital computer language.

TWAIN

Refers to an industry standard that has been developed for scanning or other external imaging devices to communicate with the computer. ImageDock and InfoCenter Lite are TWAIN compliant applications.

24-bit color

Color images composed of three 8-bit channels: red, green, and blue. With 24-bit color, it is possible to have over 16 million possible color combinations providing for a more photo-realistic image. Also called True Color. 24-bit color has nothing to do with the operating system.

30-bit color

Color images composed of three 10-bit channels: red, green, and blue. Over 50 billion color combinations are possible, providing for more vivid color reproductions with subtle gradiations of hue. 30-bit color has nothing to do with the operating system.

Brightness

The balance of dark and light shades determine the intesity of an image.

Contrast

The range between the darkest and the lightest shades determine the number of shades in an image. An image with low contrast can look dull and flat.

Gamma

Changing the gamma allows you to alter the brightness of the middle range tones without affecting the shadows or high- lights.

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